(22) For the analogous case to the above instance where the planform fill is placed in the area (*x *< 0) and

maintained at the initial beach width Y in the project area, the solution (for *x *$ 0) is:

(III-2-37)

2 ε*t*

where the nondimensionalized solution graph has the same nondimensionalized solution as provided earlier

in Figure III-2-34.

(23) A final case is presented for the situation in which groins and fill are implemented together as in Fig-

ure III-2-44. Where the initial fill is placed to the end of the groin, the solution is given by Dean (1984) as:

j

4

2 tan(αb )

2

2R

tan (αb ) %

R

R

(2*n *% 1)π

(III-2-38)

2 2

(2*n *% 1) π *t*

(2*n *% 1) π *x*

exp & ε

cos

2R

4R2

The nondimensionalized shoreline solution graph for this situation is provided in Figure III-2-45 for the

parameters W/L = 0.25 and tan (αb) = 0.1.

Longshore Sediment Transport

III-2-73

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